# specks **specks** enables a different way to check that your Ceylon code works. Instead of writing traditional tests, you write specifications. The main difference is the focus: specifications focus on behaviour and outcomes, while unit tests focus on interactions and, most of the time, implementation details. For example, here's a very simple Specification written with `specks`: testExecutor (`class SpecksTestExecutor`) test shared Specification simpleSpec() => Specification ...